Though said to be highly anticipated, 'X-Files: I Want to Believe' did not manage to come even close to 'Dark Knight' impressive sales number and it, in fact, came in fourth on the chart.

Apparently, many moviegoers didn't believe in the latest "The X-Files" feature film adaptation. Debuted in theaters a week after "The Dark Knight" made its record-breaking performance in the box office, "The X-Files: I Want to Believe" is far from presenting another impressive box office result. In fact, the sci-fi mystery movie has to be satisfied placing in fourth below its fellow newcomer "Step Brothers".

Pulling in $10 million over the three-days weekend, the Chris Carter's tidbit could not overshadow the success of "X-Files" first movie version which was released on June 19, 1998 and opened atop the box office chart with $30.1 million. Nevertheless, the disappointing result of the flick that teams up David Duchovny and Gillian Anderson once again was not a surprise. Box Office expert Gitesh Pandya has predicted that it would bow in following "Dark Knight" and "Step Brothers" with less than $20 million.

On the other box office story, the newest Batman franchise film has offered another record-breaking weekend. Staying strong at the champion seat, the Christian Bale-starrer movie has raked in an impressive $75.2 million in its second week and broken the $300 million mark in only ten days screening. With the total of $313.8 million, "Dark Knight" outpaced "Pirates of the Caribbean: Dead Man's Chest" which needed 16-days to pass the $300 million line.

Observing the solid run made by the superhero flick over the past 10 days, box office watchers predict that this blockbuster film may cross the $400 million line within its 18 or 19 days passing "Shrek 2" record of 43 days. Others even forecast that "Dark Knight" may break "Titanic" record of being the highest-grossing film in U.S. history which was set in 1997 with $600.8 million.

Following "Dark Knight" in the second place was "Step Brothers". The Will Ferrell's latest comedy film for Columbia Pictures made $30.9 million on its opening weekend placing one spot above "Mamma Mia!" which should settle for third slot with $17.7 million on its second week. Rounding up the top five was "Journey to the Center of the Earth 3D". The New Line Cinema's tidbit starring Brendan Fraser, Josh Hutcherson and Anita Briem added $9.7 million to its cume of $60.5 million.